Engines 5A, 4A, 7A-Fe
The most common and today is the most widely repaired from Japanese engines is the engines of the series (4,5,7) A- Fe. Even a novice mechanic, the diagnostics know about possible problems engines in this series. I will try to highlight (assemble in a single integer) the problems of these engines. They are a bit, but they deliver a lot of trouble to their owners.

Date from the scanner:

On the scanner you can see a short, but a capacitive date consisting of 16 parameters for which you can really appreciate the operation of the main engine sensors.

Sensors
Oxygen sensor -

Many owners are drawn to the diagnosis due to increased fuel consumption. One of the reasons is a banal intro heater in the oxygen sensor. The error is fixed by the code control unit number 21. Checking the heater can be carried out by a conventional tester on the sensor contacts (R-14 Ohm)

Fuel consumption increases due to lack of correction when warming up. You will not be able to restore the heater - only replacement will help. The cost of the new sensor is large, and the b \\ y does not make sense (the resource of their developments is great, so this is a lottery). In such a situation, as an alternative, less reliable universal NTK sensors can be installed. The term of their work is small, and the quality leaves much to be desired, therefore such a replacement of the temporary measure, and it should be made with caution.

With a decrease in the sensitivity of the sensor, an increase in fuel consumption (by 1-3l). The performance of the sensor is checked by an oscilloscope on the block diagnostic connectoror directly on the sensor's chip (switching number).

Temperature sensor.
If the owner's sensor is incorrect operation, there is a lot of problems. When the sensor measuring element is cut, the control unit replaces the sensor readings and fixes its value of 80 degrees and fixes the error 22. The engine, with such a malfunction, will work in normal mode, but only until the engine is heated. As soon as the engine cools, run it is problematic without doping, due to the small opening of the injectors. There are cases when the resistance of the sensor is chaotically changed when the engine is running on H.H. - Turns will swim

This defect is easy to fix on the scanner, watching the temperature indication. On the heated engine, it must be stable and not change chaotic values \u200b\u200bfrom 20 to 100 degrees

With this sensor defect, "black exhaust" is possible, unstable work on H.H. and as a consequence, increased flow, as well as the impossibility of running "to hot". Only after 10 minutes of sludge. If not full confidence In the proper operation of the sensor, its testimony can be replaced by turning on its chain with a variable resistor 1k, or permanent 300, for further verification. By changing the sensor readings, the change in revolutions is easily controlled at different temperatures.

Position sensor throttle valve

Many cars undergoing a disassembly assembly procedure. These are the so-called "designers". When removing the engine in the field and the subsequent assembly, sensors suffer to which the engine often lean. When the TPS sensor faults, the engine stops normally throttling. The engine when the rotation set is chopped up. The machine switches incorrectly. An error 41 is fixed by the control unit. When replacing a new sensor, you must configure that the control unit correctly seen a sign of H.H., with a fully released gas pedal (closed throttle). In the absence of a sign of idling, adequate regulation of H.H. will not be carried out. And there will be no mode of forced idling when braking the engine, which will again entail an increased fuel consumption. On the 4A engines, the 7a sensor does not require adjustment, it is installed without the possibility of rotation.
Throttle Position ...... 0%
Idle Signal .................. .on

Absolute Pressure Sensor MAP

This sensor is the most reliable, from all installed on japanese cars. The reliability is simply striking. But and his share has a lot of problems, mainly due to improper assembly. He is either broken down by the "nipple", and then seal with glue any passage of air, or the tightness of the supply tube is disturbed.

With this break, the fuel consumption increases, the level of CO in exhaust up to 3% increases. Very easy to observe the operation of the sensor on the scanner. The INTAKE Manifold line shows the discharge in the intake manifold, which is measured by the Mar sensor. When the entry wiring, the ECU registers the error 31. At the same time, the opening time of the injectors up to 3.5-5ms is sharply incremented And engine stop.

Knock sensor

The sensor is set to register detonation stuffs (explosions) and indirectly serves as a "corrector" of the ignition advance angle. The registering element of the sensor is Punoplastin. If the sensor malfunction, or the wiring break, on the passages over 3.5-4 tons. ECU turns fixes the error 52. It becomes intimidating when acceleration. You can check the performance by an oscilloscope, or, measuring, resistance between the sensor output and the housing (if there is resistance, the sensor requires replacement).

Crankshaft sensor
On the 7a series engines set the crankshaft sensor. An ordinary inductive sensor is similar to the ABC sensor, and practically sureless in operation. But confusions happen. With interstitious closure inside the winding, a disruption of the generation of pulses on certain revolutions occurs. This is manifested as a limit of engine speed in the range of 3.5-4 tons. Revolutions. A kind of cut-off, only on low revolutions. Detect the intersensile closure is quite difficult. The oscilloscope does not show a decrease in the amplitude of the pulses or the frequency change (during acceleration), and the tester notice the changes in the shares of Ohm is quite difficult. If the symptoms occur the revolutions limit on 3-4 thousand, simply replace the sensor on knowingly serviceable. In addition, a lot of trouble gives damage to the masterful crown, which damage the negligent mechanics, producing work on the replacement of the front oscillation of the crankshaft or the timing belt. To break the trunk of the crown, and restoring them with welding, it seems only the visible absence of damage. The crankshaft position sensor ceases to adequately read the information, the ignition advance angle begins to change chaotically, which leads to loss of power, unstable work Engine and increase fuel consumption

Injectors (nozzles)

With many years of operation, the nozzles and needles of the injectors are coated with resins and gasoline dust. All this naturally disrupts the correct spray and reduces the performance of the nozzle. With severe contamination, there is a tangible engine shaking, fuel consumption increases. Determine the accuracy really, by conducting gas analyzes, according to the testimony of oxygen in the exhaust, one can judge the correctness of the pouring. The testimony over one percent will indicate the need for washing injectors (when proper installation Timing and normal fuel pressure). Either by installing the injectors to the stand, and checking the performance in tests. The nozzles are easy to wash the laurel, Vince, both on installations for non-bleaching, and in ultrasound.

Idling valve, IACV

The valve is responsible for engine speed in all modes (heating, idling, Load). During operation of the valve petal, the stem is contaminated and occurs. Turns hang on warming up either on H.H. (due to the wedge). Tests for changing revolutions in scanners during the diagnosis of this motor is not provided. You can estimate the performance of the valve by changing the temperature sensor readings. Enter the engine to "Cold" mode. Or, removing the winding from the valve, to twist over the valve magnet. Singing and wedge will be tangible immediately. If it is impossible to dismantle the valve winding (for example, on the GE series), it is possible to check its performance by connecting to one of the control outputs and measuring the diversity of the pulses at the same time controlling the turns of H.Kh. and changing the load on the engine. On a fully heated engine, the unit is approximately 40%, changing the load (including electrical consumers), you can estimate an adequate increase in revolutions in response to a change in duty. With a mechanical valve jamming, a smooth extension of the duty is occurring, not entailing the change in the revolutions of H.H. You can restore the work. Cleaning the Nagar and the dirt of the carburetor cleaner when the winding is removed.

Further adjustment of the valve is to install H.Kh. On a fully heated engine, rotating winding on the mounting bolts, achieve table revs for this type car (on the tag on the hood). After setting the E1-TE1 jumper into the diagnostic shoe. On more "young" engines 4a, 7a valve has been changed. Instead of the familiar two windings in the body of the valve winding, installed a chip. Changed the nutrition of the valve and the color of the winding plastic (black). It is noiencies to measure the resistance of windings on the conclusions. The valve is supplied and the control signal of the rectangular shape of the variable duty.

For the impossibility of removing the winding, a non-standard fastener was installed. But the problem of the wedge remained. Now, if you clean the usual cleaner, the lubricant is washed out of the bearings (the further result is predictable, the same wedge, but already due to the bearing). It is necessary to completely dismantle the valve from the throttle block and then wash the rod with petal carefully.

Ignition system. Candles.

A very large percentage of cars comes to service with problems in the ignition system. When operating on low-quality gasoline, the ignition candles suffer primarily. They are covered with a red raid (ferry). There will be no qualitative sparking with such candles. The engine will work with interruptions, with skipping, increases fuel consumption, the level of CO in the exhaust increases. Sandblasts are unable to clean such candles. Only chemistry will help (a couple of hours) or replacement. Another problem increases the gap (simple wear). Drying rubber tips of high-voltage wires, water that fell when washing the motor, which all this provoke the formation of a conductive path on rubber tips.

Because of them, sparking will not be inside the cylinder, and outside it.
When smooth throttling, the engine works stably, and with a sharp - "crusher".

With this position it is necessary to replace both the candles and wires. But sometimes (in field conditions) If the replacement is impossible, you can solve the problem with a conventional knife and a piece of sandy stone (shallow fraction). I cut a knife with a conductive path in the wire, and with a stone remove the strip from the candle ceramics. It should be noted that it is impossible to remove the rubber band from the wire, this will lead to the complete inoperability of the cylinder.

Another problem is related to the wrong procedure for replacing candles. Wires with power are pulling out of the wells, pulling the metal tip of the occasion.

With such a wire, ignition skips and floating turns are observed. When diagnosing the ignition system, you should always check the ignition coil on the high-voltage discharge. The simplest check - on the engine running engine, see the spark on the discharge.

If the spark disappears or becomes a filamental - this indicates an intersless closure in the coil or on the problem in high voltage wires. Cutting the wires check the test tester. Small wire 2-3k, further to an increase long 10-12.

The resistance of the closed coil can also be checked by the tester. The resistance of the secondary winding of the coil bit will be less than 12.
Next generation coils are not suffering such a few (4a.7a), their refusal is minimal. Proper cooling and wire thickness excluded this problem.
Another problem is the current seal in the distributor. Oil, falling on the sensors, corrosive insulation. And when exposed to high voltage, the slider is oxidized (covered with a green bloom). Corner zaks. All this leads to the breakdown of spar formation. In motion there are chaotic strips (in the intake manifold, in the muffler) and crushing.

« Thin "malfunctions
On the modern engines 4A, 7A Japanese changed the firmware of the control unit (apparently for faster engine warming). The change lies in the fact that the engine reaches the turns of H.X.This at a temperature of 85 degrees. Also changed the design of the engine cooling system. Now the small circle of cooling intensively passes through the block of the block (not through the nozzle behind the engine, as before). Of course, the cooling of the head became more effective, the engine in general became more efficient. But in winter, with this cooling, when moving, the temperature of the engine reaches a temperature of 75-80 degrees. And as a result, permanent warming turns (1100-1300), increased fuel consumption and nerve owners. You can fight this problem, or the engine is stronger than the engine, or by changing the resistance of the temperature sensor (deceiving the ECU).
Butter
The owners pour oil into the engine without a special parsing without thinking about the consequences. Few people understand that various types of oils are not compatible and for mixing form an insoluble porridge (coke), which leads to the complete destruction of the engine.

All of this plasticine cannot be washed into chemistry, it is cleaned only by mechanical way. It should be understood if the old oil is unknown, it should be used before changing. And another advice to the owners. Pay attention to the color of the handle oil affection. It is yellow. If the color of the oil in your engine darker color handles - it's time to replace, and not wait for the virtual mileage recommended by the manufacturer motor oil.

Air filter
The most inexpensive and easily accessible element is an air filter. Owners very often forget about his replacement, without thinking about the likely increase in fuel consumption. Often, due to the scored filter, the combustion chamber is very polluted by oil burnt sediments, valve, candles are strongly polluted. Diagnosis can be mistakenly assumed that all wines siloslets Kolpacchkov, But the root cause is a scored air filter, which increases with dirt discharge in the intake manifold. Of course, in this case, the caps will also have to change.

Fuel filter also deserves attention. If it does not replace it in time (15-20 thousand run) the pump begins to work with overload, pressure drops, and as a result, the need to replace the pump. Plastic impeller pump parts and check valve are prematurely wearing.

Pressure drops. It should be noted that the operation of the motor is possible at a pressure of up to 1.5 kg (with a standard 2.4-2.7 kg). Upon reduced pressure, there are permanent strips in the intake manifold Running problem (in terms of). The thrust is noticeably reduced. The pressure test is properly produced. (Access to the filter is not difficult). In the field, you can use the "pouring test from the return". If during the operation of the engine in 30 seconds from the gasoline, the gasoline is less than one liter flows, one can judge reduced pressure. It is possible for indirect determination of the pump performance to use an ammeter. If the current consumed by the pump is less than 4amper, then the pressure is seized. You can measure the current on the diagnostic shoe

When using the modern tool, the filter replacement process takes no more than half an hour. Previously, it took a lot of time. Mechanics always hoped in case they were lucky and the lower nozzle did not fit. But often it happened. I had to break my head with a long way to hook a rolling nut of the lower fitting. And sometimes the filter replacement process turned into a "film" with the removal of the tube applying to the filter.

Today, no one is afraid of this replacement.

Control block
Until 1998. year of releaseThe control blocks did not have enough serious problems when operating.

Repair blocks accounted for only because of the "hard ignition". It is important to note that all conclusions of the control unit are signed. It is easy to find the required output of the sensor to check, or the wire transversions. Details are reliable and stable at low temperatures.
In conclusion, I would like to stop a little on gas distribution. Many owners "with hands" procedure for replacing the belt are performed independently (although it is not correct, they cannot properly tighten the crankshaft pulley). Mechanics produce qualitative replacement Within two hours (maximum), when the belt belt is cut, the valves are not found with the piston and the fatal destruction of the engine does not occur. Everything is designed to smallest things.

We tried to tell about the most frequently arising problems on the engines of this series. The engine is very simple and reliable and subject to very tight operation on "water-iron gasolines" and dusty roads to our Great and Mighty Motherland and the "Avosny" mentality of the owners. All mockery, he still continues to delight his reliable and stable workBy won the status of the best Japanese engine.

All successful repairs.

"Reliable japanese engines" Notes car diagnostic

Family A enters the second wave (1980 - 2000) of the Japanese Motor Building Toyota. Execution 5A has a smaller piston diameter than the previous version 4a - 78.7 mm instead of 81 mm. The engine volume decreased to 1.5 liters, power up to 105 liters. s., torque up to 143 nm. Unlike the previous series, the 5a FE engine does not have sports versions of GE, turbocharged modifications and generations with constructive changes.

Specifications 5a Fe 1.5 l / 105 liters. from.

Initially, the Toyota series of the series A is laid for reliability, high maintainability and a huge supply of spare parts. Looks like engine scheme as follows:

• R4 is a row four, cylinders are flowing inside the cast-iron case, the lubricant / cooling channels are made during casting;
• the belt is driven and the timing, and hinged equipment;
• motors are designed for C / D Class cars, Caldina / Carina / Corona 170 - 210 and Corolla / Sprinter 90 - 110 families.

DVS has been manufactured in Japan for the domestic market and in China for all Southeast Asia. An important feature is the lack of the impact of the piston / valve when the belt drive is broken. In other words, the 5a FE motor does not oppress the valve.

In order to increase the power, electronic EFI injection is used in the design. Valves are located relative to each other at an angle of 22.3 degrees. The ignition system is first traver, then without a charge peder, two-way DIS-2.

Correspond specifications 5a Fe given in the bottom table values:

The user manual contains a description of the parameters of the power drive, the regulations are the drawings of the main actions that make it necessary to carry out the maintenance of the motor and its overhaul.

Design features

The official manual on the atmospheric row engine 5a Fe contains a design description:

• the cast iron unit, the cylinders are crushed in the body without a sleeve, which dramatically increases maintainability and reduces the cost;
• cylinder head dual with DOHC 16V gas distribution;
• initially, the ignition system consisted of a common coil, a traver, a beam of high-voltage wires, later added the second coil according to the DIS-2 scheme;
• there are no hydrocompensators, no VVTI couplings, therefore, the requirements for the quality of oil are quite low;
• forcing is most often made by analogy with the AvtoVAZ engines in the cylinder boring;
• the overhaul is easily performed in the garages on its own;
• a feature of the design is the belt drive of one camshaft, the second gets rotation to the gear wheel from it.

The design is very simple, reliable, maintainable, highly massive.

The list of modifications of the DVS

In the 5a series, there are only three versions of engines, one of which is 5a-Fe. Two others are its modifications, respectively:

• 5a-F carburetor version was produced in the period 1987-1990, the engine had an 85 liter power. from. and the compression ratio of 9.8 units;
• in the 5a-Fhe version, the intake manifold was upgraded, camshafts with increased phases and fist lift height were installed inside the GBC, Motor was produced in 1991-1999, had a power of 120 liters. p. applied exclusively in the domestic market.

Accordingly, the original attachment equipment was used, not interchangeable with the basic version of 5a-Fe.

Pros and cons

An inline atmospheric device of the DVS provides a number of advantages to the owner:

• saving the operational budget - AI-92, the presence of spare parts, independent service and repair on the knee;
• resource from 350000 miles of run, even on domestic gasoline;
• the possibility of forcing to increase torque.

Disadvantages are also present, but in toyota motors They are not so much:

• adjusting thermal gaps of valves every 30000 km;
• non-discharge of piston fingers - fixed, and not floating landing;
• intensive depreciation of camshafts inside the GBC;
• ignition problems.

The main advantage is the absence of the collision of the valve and the piston in the sudden cutting of the timing drive.

List of car models in which installed

The 5a FE motor was designed, not only for specific classes C and D, but also under the families toyota cars:

• Carina - 1990 - 1992 in the Bodger AT170, 1992 - 1996 in the body AT192 and 1996 - 2001 in the body AT212;
• Corolla - 1989 - 1992 in the body AE91, 1991 - 2001 in the body AE100, 1995 - 2000 in the body AE110, Ceres 1992 - 1998 in the Bodger AE100;
• Corona - 1989 - 1992 in the Body AT170;
• Soluna - 1996 - 2003 in the Body Al50 for Southeast Asia;
• Sprinter - 1989 - 1992 in the body AE91, 1991 - 1995 in the body AE100, 1995 - 2000 in the body AE110, Marino 1992 - 1998 in the Bodger AE100;
• VIOS - 2002 - 2006 in the Body AXP42 for China;
• Tercel - 1990 - 1994 In the body of a sedan for Chile and a coupe for Canada, USA.

The manufacturer appreciated the characteristics of the engine, and the successful design of the 5a Fe execution, so even after the Toyota ceased to install these motors, chinese company FEW continued their release for their own Faw Xiali Weizi.

Rules of maintenance 5a FE 1.5 l / 105 liters. from.

During operation, the 5a FE engine requires periodic care within a specific time limit:

• change the timing belt and mounted after 50,000 km;
• developers are recommended to regulate heat clearances valves after 30000 mileage;
• cleaning for ventilation Carter Manufacturer is provided every 20 thousand km;
• the manufacturer recommends the replacement of engine oil and oil filter 7500 km;
• the fuel filter is enough for an average of 40,000 runs;
• on the manufacturer's recommendation, the air filter is set new each year;
• according to the date of the production of antifreeze from the plant, it is enough for two years or 40,000 km;
• in the ignition candles for the engines of the resource 20,000 mileage;
• the exhaust manifold will progrit after 60000 km.

After the forcing, the resource of the friction pairs is reduced by 20 - 30%, so consumables will have to be changed more often.

Overview of faults and ways to repair

With increasing mileage, the 5A FE motor can reveal the following problems:

These faults are characteristic of the Toyota Motors.

Motor tuning options

Initially, the 5a FE engine is deformed relative to previous versions, so inexpensive mechanical tuning is possible here:

• boring cylinders up to 81 mm;
• using pistons from 4a-Fe.

In fact, the user receives the previous version of the motor with a combustion chamber of 1.6 liters. Further tuning is performed according to the classic scheme:

• grinding the channels of the intake manifold and the GBC;
• "Evil" camshafts, at least 5a FHE or with large phases;
• "Spider" on the exhaust, "cheating" instead of the second sensor CO;

Motor is household, therefore optimal option Is SWAP to the sports version of 4a GE. A little cheaper will be turbo tuning:

• ordering whale on a low-power turbine;
• installation of high-performance, type 360ss nozzles;
• straight-flowing with a cross section of 51 mm exhaust;
• using the Walbro GSS342 fuel pump with a capacity of 255 l / h;
• go to software Abit M11.3.

Upon receipt of 150 liters. from. The resource of the friction pairs and engine will noticeably decrease. To restore it, you will have to modify the head, SPG and replace the crankshaft.

Thus, the 5A-FE motor was created for two families of Toyota cars - Corolla / Sprinter and Karina / Calin C and D classes. Power drive is very reliable, economical intended for calm driving in the city cycle. The design is poorly forced, but absolutely maintainable.

If you have any questions - leave them in the comments under the article. We or our visitors will gladly respond to them

Toyota 5a-F / Fe / FE 1.5 l engine.

Engine characteristics Toyota 5A

Motor faults and repair 5A-F / FE / FE

The Toyota 5A engine is an analogue of the motor 4a, in which the diameter of the cylinders from 81 mm to 78.7 mm is reduced, thus obtained the volume of 1,500 cc. Otherwise, we have the same 4A-F / FE / FE, with all its pros and cons. The usual civil engine, GE / GZE sports versions on the basis of 5a was not developed.

Toyota 5A engine modifications

1. 5A-F - carburetor version, 4a-F analogue with a reduced volume. Compression ratio 9.8, Power 85 hp The engine was in production from 1987 to 1990.
2 . 5A-FE - an analogue 4a-Fe, represents a 5a-F with electronic fuel injection, compression ratio 9.6, power 105 hp The engine production was started in 1987, finished in 2006, after which production was transferred to FAW and now they are equipped with Chinese cars.
3. 5A-FHE - version with modified GBC, other camshafts, a bit changed inlet, another exhaust manifold, power increased to 120 hp. In production was from 19891 to 1999 and put on cars for the inner Japanese market.

Malfunctions and their causes

One-to-one motor design repeats the 4a motor, all those faults are currently relevant for 4a, belong to 5a: Problems with a rubber, with a lambda probe, with a motor temperature sensor, after which the engine does not start, float due to dirty damper, idling sensor Stroke and so on. There are no hydraulic components for 5a, therefore, once in 100 thousand, we carry out the procedure for adjusting the valves, after the same mileage we change the timing belt. In general, everything is standard for the series A, a complete list of engine diseases look.

Toyota 5A-F / FE / FE engine tuning

Chip tuning. Atmo. Turbo

Exactly as with in atmospheric version of the motor will not show anything supernatural. The only thing that makes sense is to settle the cylinders to a diameter of 81 mm, under the piston 4a-Fe, thereby we get a working volume of 1.6 liters and actually the 4a-Fe engine, but there is a risk to run into casting defects. You can put a straight-flow exhaust with spider 4-2-1, but this will not give anything serious.

5a-Fe turbine

Initially, this motor was developed for the most relaxed movement, no sport was envisaged, so any serious tuning would entail the replacement of the entire regular junk, it applies to the tuning and turbine as the way. The most sensible option from possible, it is to order a whale on a 4a-Fe on a small turbine and put on a standard piston, pre-putting the nozzle 360ss, the pump Valbro 255 and the forwarding release on the 51st pipe, set up on the abita. It will give it up to 140-150 hp, the resource will be much reduced. Want a resource, change the crankshaft, SPGs, saw CHC ... or Saw 4a-GE)).

Toyota car giant in 1987 began work on the release of a new line power aggregatesinstalled on cars. She received the label "5a". In this article we will analyze the engine 5aFE.. Throughout the production period, which was 12 years old, the power plant was produced in three types of modification.

They received the following names:

• the first generation is 5A-F;
• the second generation is 5a-Fe;
• the third generation is 5A-FHE.

First generation

The power unit with an index 5a-F, differs by the presence of a gas distribution mechanism, in the design of which 4 valves are installed on 1 cylinder according to the DOHC scheme. In other words, in the engine there are two camshafts that move their row of valves.

This system allows one distributional shaft Move the intake valve, and the other is prom. Using valve pushers are driven. Thanks to the DOHC system, the Toyota 5A line engines have high power rates.

Second generation

Engine 5A-FE is an advanced version of 5a-Fe. Big modification touched the system responsible for injection fuel mixes. Final result showed that the engine was installed electronic injector system Fuel injection, called EFI - Electronic Fuel Injection.

Due to the high quality of the design, this motor is considered very successful. He is also well exposed repair work. Find spare parts for this power plant is not a problem. The release of a joint Japan-Chinese enterprise Toyota and Tianjin Faw Xiali, produced with data by power plants under the hood, to this day. Them put on salt potators, such as Vela and Weizhi.

How is the motor in Russia?

Most domestic owners motor vehicles Toyota, under the hood of which there is a modification of the engine, called 5a-Fe, leave positive evaluations performance characteristics 5a-Fe. They argue that the values \u200b\u200bof the engine resource on average is 300 thousand km. Further operation of the car is accompanied by an increase in the consumption of oil liquid. The replacement of oilmaging caps should be carried out when the mileage will be 200,000 km. Subsequent similar operations must be carried out with a periodicity of 100,000 km.

Lots of toyota owners, whose power plant is called 5a-Fe, faced a problem that was felt in the craft failures, when driving on the average speed of rotation crankshaft. It occurs when using poor quality russian fuelor the availability of problems in nutrition and ignition systems.

Minuses of Motor

Operating process power plants 5A-FE does not do without flaws

1. Beds installed on camshafts are predisposed to elevated wear.
2. Fixed type of piston fingers.
3. The emergence of difficulties when adjusting the bodies of the ink valves.

Despite this, exercise overhaul This motor is rarely produced.

If you need to replace motor InstallationIt is fairly easy to buy a 5a-Fe contract engine. The state of most of them is not bad, and the price is acceptable.

It is worth noting that Japanese contract engines not exploited on the territory Russian Federation. Japanese manufacturers are leaders in terms of speed with which updated model Rows motor vehicles. This allows companies involved in disassembling spare parts, carry out car purchase. In which engines are installed with a fair reserve of the resource of operation.

We bring to your attention the price for a contract engine (without run in the Russian Federation) 5aFE.

The most common and widely repaired from Japanese engines is the engines of the series (4,5,7) A- Fe. Even a novice mechanic, the diagnost knows about the possible problems of engines in this series. I will try to highlight (assemble in a single integer) the problems of these engines. They are not much, but they deliver a lot of trouble to their owners.

Sensors.

Oxygen sensor - lambda probe.

"Oxygen sensor" - used for fixing oxygen in exhaust gases. His role is invaluable in the process of fuel correction. Read more about sensor problems in article.

Many owners appeal for diagnosis due to increased fuel consumption. One of the reasons is a banal intro heater in the oxygen sensor. The error is fixed by the code control unit number 21. Checking the heater can be carried out by a conventional tester on the sensor contacts (R-14 Ohm). Fuel consumption increases due to the absence of fuel correction when warming up. You will not be able to restore the heater - only the sensor replacement will help. The cost of the new sensor is large, and the b \\ y does not make sense (the resource of their developments is great, so this is a lottery). In such a situation, as an alternative, you can set no less reliable universal NTK sensors, Bosch or original DENSO.

The quality of the sensors is not inferior to the original, and the price is significantly lower. The only problem can be the correct connection of the sensor conclusions. After a decrease in the sensitivity of the sensor also an increase in the fuel consumption (by 1-3l). The performance of the sensor is checked by an oscilloscope on the block of diagnostic connector, or directly on the sensor's chip (switching number). Sensitivity drops in poisoning (pollution) of the sensor with combustion products.

Engine temperature sensor.

"Temperature sensor" is used to register the temperature of the motor. If the owner's sensor is incorrect operation, there is a lot of problems. When the sensor measuring member is cut, the control unit replaces the sensor readings and fixes its value of 80 degrees and fixes the error 22. The engine, with such a malfunction, will work in normal mode, but only until the engine is heated. As soon as the engine cools, run it is problematic without doping, due to the small opening of the injectors. There are cases when the resistance of the sensor is chaotically changed when the engine is running on H.H. - The turnoves will float. This defect is easy to fix on the scanner, watching the temperature indication. On the heated engine, it should be stable and not changed chaotic values \u200b\u200bfrom 20 to 100 degrees.

With this defect of the sensor, "black caustic exhaust" is possible, unstable work on H.H. And, as a result, increased consumption, as well as the impossibility of running a heated motor. Run the motor will be obtained only after 10 minutes of sludge. If there is no complete confidence in the proper operation of the sensor, its readings can be replaced by turning on its chain with a variable resistor 1c, or permanent 300, for further verification. By changing the sensor readings, the change in revolutions is easily controlled at different temperatures.

Throttle position sensor.

Throttle Position Sensor Shows on-board computer In what position is the throttle.

A lot of cars took place a procedure for assembling disassembly. These are the so-called "designers". When removing the engine in the field and the subsequent assembly suffered sensors to which the engine often lean. When the TPS sensor faults, the engine stops normally throttling. The engine when the rotation set is chopped up. The machine switches incorrectly. An error 41 is fixed by the control unit. When replacing a new sensor, you must configure that the control unit correctly seen a sign of H.H., with a fully released gas pedal (closed throttle). In the absence of a sign of idling, there will be no adequate control of H.H., and there will be no mode of forced idling when the engine is braked, which will again entail an increased fuel consumption. On the engines 4a, the 7a sensor does not require adjustment, it is installed without the possibility of adjusting. However, in practice, it is not uncommon for cases of bending a petal that moves the sensor core. There is no sign of x / x. Regulation proper position You can implement using the tester without the use of the scanner- on the basis of idle.

Throttle Position ...... 0%
Idle Signal .................. .on

Absolute Pressure Sensor Map

The pressure sensor shows the computer a real discharge in the collector, according to its indications the composition of the fuel mixture is formed.

This sensor is the most reliable, of all installed on Japanese cars. The reliability is simply striking. But and his share has a lot of problems, mainly due to improper assembly. It is either a receiving "nipple", and then seal with glue any passage of air, or disrupt the tightness of the supply tube. In such a break increases the fuel consumption, the level of CO in the exhaust of up to 3% is easily observed. The INTAKE Manifold line shows the discharge in the intake manifold, which is measured by the Mar sensor. When the ECU wiring breakages the error 31. At the same time, the opening time of injectors up to 3.5-5ms increases sharply. In the penitz, black exhaust appears, candles are planted, shaking appears on H.H. And engine stop.

Knock sensor.

The sensor is set to register detonation stuffs (explosions) and indirectly serves as a "corrector" of the ignition advance angle.

The registering element of the sensor is Punoplastin. If the sensor malfunction, or the wiring break, on the passages over 3.5-4 tons. ECU turns fixes the error 52. It becomes intimidating when acceleration. You can check the performance by an oscilloscope, or, measuring, resistance between the sensor output and the housing (if there is resistance, the sensor requires replacement).

Crankshaft sensor.

The crankshaft sensor generates pulses by which the computer calculates the rotation speed of the engine crankshaft. This is the main sensor for which all the operation of the motor is synchronized.

On the 7a series engines set the crankshaft sensor. An ordinary inductive sensor is similar to the ABC sensor, and practically sureless in operation. But confusions happen. With interstitious closure inside the winding, a disruption of the generation of pulses on certain revolutions occurs. This is manifested as a limit of engine speed in the range of 3.5-4 tons. Revolutions. A peculiar cut-off, only on low revs. Detect the intersensile closure is quite difficult. The oscilloscope does not show a decrease in the amplitude of the pulses or the frequency change (during acceleration), and the tester notice the changes in the shares of Ohm is quite difficult. If the symptoms occur the revolutions limit on 3-4 thousand, simply replace the sensor on knowingly serviceable. In addition, a lot of trouble gives damage to the masterful crown, which breaks mechanics, producing work on the replacement of the front oscillation of the crankshaft or the timing belt. To break the trunk of the crown, and restoring them with welding, it seems only the visible absence of damage. The crankshaft position sensor ceases to adequately read the information, the ignition advance angle begins to change chaotically, which leads to the loss of power, unstable operation of the engine and an increase in fuel consumption.

Injectors (nozzles).

Injectors are electromagnetic valves that injected fuel under pressure in the intake manifold engine. Manages the operation of the engine injectors -computer.

With many years of operation, the nozzles and needles of the injectors are coated with resins and gasoline dust. All this naturally disrupts the correct spray and reduces the performance of the nozzle. With severe contamination, there is a tangible engine shaking, fuel consumption increases. Determine the accuracy really, by conducting gas analyzes, according to the testimony of oxygen in the exhaust, one can judge the correctness of the pouring. The reading over one percent will indicate the need to wash the injectors (with proper installation of the timing and normal fuel pressure). Either by installing injectors on the stand, and checking the performance in tests, in comparison with the new injector. The nozzles are very effectively cleaning the laurel, Vince, both at installations for non-bleed washing and in ultrasound.

Idling valve.iac

The valve is responsible for engine speed in all modes (heating, idling, load).

During operation of the valve petal, the stem is contaminated and occurs. Turns hang on warming up either on H.H. (due to the wedge). Tests for changing revolutions in scanners during the diagnosis of this motor is not provided. You can estimate the performance of the valve by changing the temperature sensor readings. Enter the engine to "Cold" mode. Or, removing the winding from the valve, to twist over the valve magnet. Singing and wedge will be tangible immediately. If it is impossible to easily dismantle the valve winding (for example, on the GE series), you can check its performance by connecting to one of the control outputs and measuring, the diversity of the pulses, while simultaneously controlling the revolutions of H.H. and changing the load on the engine. On a fully heated engine, the unit is approximately 40%, changing the load (including electrical consumers), you can estimate an adequate increase in revolutions in response to a change in duty. With a mechanical valve jamming, a smooth extension of the duty is occurring, not entailing the change in the revolutions of H.H. You can restore the work. Cleaning the Nagar and the dirt of the carburetor cleaner when the winding is removed. Further adjustment of the valve is to install H.Kh. On a completely warm engine, rotation of the winding on the mounting bolts, the table revolutions are achieved for this type of car (on the tag on the hood). After setting the E1-TE1 jumper into the diagnostic shoe. On more "young" engines 4a, 7a valve has been changed. Instead of the familiar two windings in the body of the valve winding, installed a chip. Changed the nutrition of the valve and the color of the winding plastic (black). It is noiencies to measure the resistance of windings on the conclusions. The valve is supplied and the control signal of the rectangular shape of the variable duty. For the impossibility of removing the winding, a non-standard fastener was installed. But the problem of the rod wedge remains. Now, if you clean the usual cleaner, the lubricant is washed out of the bearings (the further result is predictable, the same wedge, but already due to the bearing). It is necessary to completely dismantle the valve from the throttle block and then wash the rod with petal carefully.

Ignition system. Candles.

A very large percentage of cars comes to service with problems in the ignition system. When operating on low-quality gasoline, the ignition candles suffer primarily. They are covered with a red raid (ferry). There will be no qualitative sparking with such candles. The engine will work with interruptions, with skipping, increases fuel consumption, the level of CO in the exhaust increases. Sandblasts are unable to clean such candles. Only chemistry will help (a couple of hours) or replacement. Another problem increases the gap (simple wear). Drying rubber tips of high-voltage wires, water that fell when washing the motor, provoke the formation of a conductive path on rubber tips.

Because of them, sparking will not be inside the cylinder, and outside it. With a smooth throttling, the engine works stably, and with a sharp - a crusher. With this position it is necessary to replace both the candles and wires. But sometimes (in field conditions) If the replacement is impossible, you can solve the problem with a conventional knife and a piece of sandy stone (shallow fraction). I cut a knife with a conductive path in the wire, and with a stone remove the strip from the candle ceramics. It should be noted that it is impossible to remove the rubber band from the wire, this will lead to the complete inoperability of the cylinder.
Another problem is related to the wrong procedure for replacing candles. The wires with power are pulling out of the wells, pulling the metal tip of the occasion. With such a wire, ignition passages and floating turns are observed. When diagnosing the ignition system, you should always check the ignition coil on the high-voltage discharge. The simplest check - on the engine running engine, see the spark on the discharge.

If the spark disappears or becomes a filamental - this indicates an intersless closure in the coil or on the problem in high-voltage wires. Cutting the wires check the test tester. The small wire is 2-3k, further to the magnification is long 10-12. The resistance of the closed coil can also be checked by the tester. The resistance of the secondary winding of the coil bit will be less than 12.

Next generation coils (remote) are not suffering such a few (4a.7a), their refusal is minimal. Proper cooling and wire thickness excluded this problem.

Another problem is the current seal in the distributor. Oil, falling on the sensors, corrosive insulation. And when exposed to high voltage, the slider is oxidized (covered with a green bloom). Corner zaks. All this leads to the breakdown of spar formation. In motion there are chaotic strips (in the intake manifold, in the muffler) and crushing.

Thin malfunctions

On modern engines 4a, 7a, the Japanese changed the firmware of the control unit (apparently for faster engine warming). The change lies in the fact that the engine reaches the turns of H.X.This at a temperature of 85 degrees. Also changed the design of the engine cooling system. Now the small circle of cooling intensively passes through the block of the block (not through the nozzle behind the engine, as before). Of course, the cooling of the head became more effective, the engine in general became more efficient. But in winter, with this cooling, when moving, the temperature of the engine reaches a temperature of 75-80 degrees. And as a result, permanent warming turns (1100-1300), increased fuel consumption and nerve owners. You can fight this problem, or the engine is stronger, or changing the resistance of the temperature sensor (deceiving the ECU) or replacing the thermostat for the winter with more high temperatures discoveries.
Butter
The owners pour oil into the engine without a special parsing without thinking about the consequences. Few people understand that various types of oils are not compatible and for mixing form an insoluble porridge (coke), which leads to the complete destruction of the engine.

All of this plasticine cannot be washed into chemistry, it is cleaned only by mechanical way. It should be understood if the old oil is unknown, it should be used before changing. And another advice to the owners. Pay attention to the color of the oily probe handle. It is yellow. If the color of the oil in your engine is darker color handles - it's time to replace, and not wait for the virtual mileage recommended by the manufacturer of the engine oil.
Air filter.

The most inexpensive and easily accessible element is an air filter. Owners very often forget about his replacement, without thinking about the likely increase in fuel consumption. Often, due to the scored filter, the combustion chamber is very polluted by oil burnt sediments, valve, candles are strongly polluted. Diagnosis can be mistakenly assumed that all the wisest wear of the oil caps, but the root cause is a scored air filter, which increases the discharge in the intake manifold when contaminated. Of course, in this case, the caps will also have to change.
Some owners do not even notice about accommodation in the building air filter garage rodents. What speaks of their complete emptying to the car.

The fuel filter also deserves attention. If it does not replace it in time (15-20 thousand run) the pump begins to work with overload, pressure drops, and as a result, the need to replace the pump. Plastic impeller pump parts and check valve are prematurely wearing.

Pressure drops. It should be noted that the operation of the motor is possible at a pressure of up to 1.5 kg (with a standard 2.4-2.7 kg). Upon reduced pressure, there are permanent strips in the intake manifold Running problem (in terms of). The thrust is noticeably reduced. The pressure check is properly produced by a manometer (access to the filter is not difficult). In the field, you can use the "pouring test from the return". If during the operation of the engine in 30 seconds from the gasoline, the gasoline is less than one liter flows, one can judge reduced pressure. It is possible for indirect determination of the pump performance to use an ammeter. If the current consumed by the pump is less than 4amper, then the pressure is seized. You can measure the current on the diagnostic shoe.

When using the modern tool, the filter replacement process takes no more than half an hour. Previously, it took a lot of time. Mechanics always hoped in case they were lucky and the lower nozzle did not fit. But often it happened. I had to break your head for a long time, how to hook a rolling nut of the lower fitting. And sometimes the filter replacement process turned into a "film" with the removal of the tube applying to the filter. Today, no one is afraid of this replacement.

Control block.

Until 98 years of release, the control blocks did not have enough serious problems during operation. Repair blocks accounted for only due to tough ransom. It is important to note that all conclusions of the control unit are signed. It is easy to find the required sensor output on the board to check or wire transversions. Details are reliable and stable at low temperatures.

In conclusion, I would like to stop a little on gas distribution. Many owners "with hands" procedure for replacing the belt are performed independently (although it is not correct, they cannot properly tighten the crankshaft pulley). Mechanics produce a high-quality substitution for two hours (maximum) when the valve belt breaks are not found with the piston and the fatal destruction of the engine does not occur. Everything is designed to smallest things.
We tried to tell about the most frequently arising problems on the engines of this series. The engine is very simple and reliable and subject to very tight operation on "water-iron gasolines" and dusty roads to our great and mighty homeland and the "Avosny" mentality of the owners. He moved all the bullying, he still continues to delight with his reliable and stable work, won the status of the most reliable Japanese engine.
Vladimir Bacrenev Khabarovsk.
Andrei Fedorov, Novosibirsk.

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